Ventilator



Feb. 17, 1931. A, HERTEL 1,792,585

VENTILA'I'OR Filed Feb. 12, 1929 x Hg] Unventbr a/nfm ai ed? 1 Wfiktomeg Patented Feb. 17, 1931 UNITED STATES ANTON HERTEL, OFHEIDELBERG, GERMANY VENTILATOR Application filed February 12, 1929,Serial No. 339,388, and in Germany February 21, 1928.

latter may be unrler control. The invention also comprehendsimprovements in the details of construction and arrangement of partswhich will be hereinafter described and particularly pointed out in theclaims.

In the drawings:

Fig. 1 is a horizontal section of a chimney showing the application ofthe invention.

Fig. 2 is a front view of the ventilator.

Fig. 3 is a vertical section on the line 3'3 of Fig. 2.

a designates a portion of a chimney having an opening I). Inserted inthe opening I) is a cylindricalcasing'c, open at its inner end, andcovered on its outer end with an ornamental rosette d, having a seriesof slots d, the rosette being attached by screws to cars 0 on thecylindrical casing 0.

Mounted in the outer end of the cylindrical casing 0 adjacent therosette are two flaps or valves e, pivoted at their upper and lower endsat f. These flaps are vertically disposed and are preferably made ofthin sheet metal. and when in closed position close the end of thecasing against the passage of draft.

It is desirable to limit the opening move ment of the flaps in order toregulate the out-v going draft, and I therefore provide adj ust- I ablemeans to accomplish this function.

This means consists of a slidable stop g, arranged in the, bottom of thecasing 0, with means associated therewith for controlling its position.

I Depending from the stop 9 is a lug gt which slot.

ment of the flaps, whereby the position of the off, this at times beingdesirable.

passes through a slot 0 in the bottom of the casing. The stop isarranged adjacent the lower ends of the flaps j, and is provided with aspring it, having one end attached to said stop and its opposite endattached to the casing, the tension of the spring being such as to drawthe stop toward the rear end of the A cord or chain is attached to thefront end of the stop, and is guided over a pulley is to a convenientplace in the room.

By adjusting the position of the stop, the opening movement of the flapscan readily be controlled and thereby regulate the draft passing fromthe room, or if desired closing the casing against the passage of air.

In operation, the position of the stop-is regulated, and the air fromthe, room will open the flaps, and such air will pass to the chimney. Ifthe incoming draft is stronger than the outgoing draft,the flaps orvalves will be automatically closed, as well understood in this art.Ifthe flaps open too wide and thereby permit the passage of too much airfrom the room, the stop 9 is adjusted to the desired position by pullingon the cord or chain and securing the same, hence the opening movementof the flaps is limited. Of course, if the stop is drawn up to contactwith the flaps, the draft will be entirely out The rosette presents anornamental appearance to the ventilator, and the sametime it does notdetract from the operation of the flaps.

It is to be understood that the invention is not limited to the use oftwo flaps, as it is evident one or more may be used if desired.

\Vhat I claim is: 1. A ventilator comprising a casing open at one end, arosette having openings and arranged over the outer end of the casing,pivotally mounted flaps in the outer end of the casing adjacent therosette, a stop spring actuated in one direction, in the bottom portionof the casing near the lower ends of the flaps which cooperates withsaid flaps to regulate their open position, and means for adj usting theposition of the stop to regulate the opening of the flaps.

2. A ventilator comprising a casing, piv

otally mounted valve means in the casing, 21 stop'mounted in the casingadapted to be positioned in the path of movement of the valve means, aspring to limit the movement of the stop in one direction, and manualmeans for moving the stop in the opposite direction, whereby to regulatethe opening movement of the valve means.-

In testimony whereof I aflix my signature.

ANTON HERTEL.

